I'm going to try the new installer at bigsql, thanks!
Did the Postgres server actually get installed? - I think so. I have Postgres in Programs folder
Do you have a postgres OS user? - I don't know. I assume the postgres user is created upon install. I have not done anything (create user) after install.
Can you connect to the server in any manner? - This is as far as I get:
Just re-ran installer in Administrator mode with no difference. Correction on previous statement: the installed does ask for Paths but does not ask for a PW.